The shipping industry promulgated a voluntarycode.
航运业对自律守则进行了宣传。
《柯林斯英汉双解大词典》
2
G20 ministers also talked about the possibility of creating a "voluntarycode of conduct" to govern negotiations between creditors and countries on the verge of defaulting on debt.
G20 财长们还讨论了建立“自愿行为准则”的可能性,以指导债权人和濒临债务违约的国家之间的谈判。
3
That is not always so, because regulators keep an eye on them through the Banks which trade with them. But he suggested there should be a voluntarycode of conduct.